22271225 has 12 divisors (see below), whose sum is σ = 28363884. Its totient is φ = 17334720.

The previous prime is 22271219. The next prime is 22271231. The reversal of 22271225 is 52217222.

It is an interprime number because it is at equal distance from previous prime (22271219) and next prime (22271231).

It can be written as a sum of positive squares in 6 ways, for example, as 2699449 + 19571776 = 1643^2 + 4424^2 .

It is not a de Polignac number, because 22271225 - 2¹⁸ = 22009081 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22271225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11114 + ... + 12963.

It is an arithmetic number, because the mean of its divisors is an integer number (2363657).

Almost surely, 2^22271225 is an apocalyptic number.

22271225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22271225 is a deficient number, since it is larger than the sum of its proper divisors (6092659).

22271225 is a wasteful number, since it uses less digits than its factorization.

22271225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24124 (or 24119 counting only the distinct ones).

The product of its digits is 1120, while the sum is 23.

The square root of 22271225 is about 4719.2398752341. The cubic root of 22271225 is about 281.3507227720.

Adding to 22271225 its reverse (52217222), we get a palindrome (74488447).

The spelling of 22271225 in words is "twenty-two million, two hundred seventy-one thousand, two hundred twenty-five".